CVE-2022-36056 (Medium) detected in github.com/sigstore/cosign-v1.0.1

[mend-bolt-for-github]

CVE-2022-36056 - Medium Severity Vulnerability

Vulnerable Library - github.com/sigstore/cosign-v1.0.1

Container Signing

Library home page: https://proxy.golang.org/github.com/sigstore/cosign/@v/v1.0.1.zip

Path to dependency file: /go.mod

Path to vulnerable library: /go.mod

Dependency Hierarchy:

• ❌ github.com/sigstore/cosign-v1.0.1 (Vulnerable Library)

Found in HEAD commit: df1f7d3f67826e841793324e4796be4fbd91c00f

Found in base branch: main

Vulnerability Details

Cosign is a project under the sigstore organization which aims to make signatures invisible infrastructure. In versions prior to 1.12.0 a number of vulnerabilities have been found in cosign verify-blob, where Cosign would successfully verify an artifact when verification should have failed. First a cosign bundle can be crafted to successfully verify a blob even if the embedded rekorBundle does not reference the given signature. Second, when providing identity flags, the email and issuer of a certificate is not checked when verifying a Rekor bundle, and the GitHub Actions identity is never checked. Third, providing an invalid Rekor bundle without the experimental flag results in a successful verification. And fourth an invalid transparency log entry will result in immediate success for verification. Details and examples of these issues can be seen in the GHSA-8gw7-4j42-w388 advisory linked. Users are advised to upgrade to 1.12.0. There are no known workarounds for these issues.

Publish Date: 2022-09-14

URL: CVE-2022-36056

CVSS 3 Score Details (5.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: High
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-8gw7-4j42-w388

Release Date: 2022-09-14

Fix Resolution: v1.12.0

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